- RESEARCH HIGHLIGHT
Sensitive techniques show rising levels of two forms of helium, one expected and one a mystery.
Levels of helium in Earth’s atmosphere are rising, thanks to the burning of fossil fuels1.
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Nature 605, 399 (2022)
doi: https://doi.org/10.1038/d41586-022-01278-x
References
Birner, B., Severinghaus, J., Paplawsky, B. & Keeling, R. F. Nature Geosci. https://doi.org/10.1038/s41561-022-00932-3 (2022).
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